Can I put peppermint oil on transplanted hair after 3 weeks?

It is best to contact your surgeon for post surgery issues and care since all doctors have slightly different instructions.

I respect the fact that you want to use a natural product. As long as there isn’t any crusting it will be fine to put oils on your transplanted area. I’m curious to know your results, please let me know. Good luck.

As of two weeks after the surgery, you can put any product in your hair your choose to.  The recipient area should be completely healed as the follicles are embedded in your scalp.  Look for the hair to start growing between 3-4 months.